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.\"     Nick Hibma <n_hibma@FreeBSD.org>. All rights reserved.
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.Dd April 24, 2018
.Dt UHCI 4
.Os
.Sh NAME
.Nm uhci
.Nd UHCI USB Host Controller driver
.Sh SYNOPSIS
.Cd "device uhci"
.Sh DESCRIPTION
The
.Nm
driver provides support for UHCI-type PCI based USB controllers.
.Sh HARDWARE
The
.Nm
driver supports all UHCI v1.1 compliant controllers including:
.Pp
.Bl -bullet -compact
.It
Intel 82371AB/EB (PIIX4)
.It
Intel 82371SB (PIIX3)
.It
VIA 83C572
.El
.Sh SYSCTL VARIABLES
The following variables are available as both
.Xr sysctl 8
variables and
.Xr loader 8
tunables:
.Bl -tag -width indent
.It Va hw.usb.uhci.debug
Debug output level, where 0 is debugging disabled and larger values increase
debug message verbosity.
Default is 0.
.El
.Sh SEE ALSO
.Xr ehci 4 ,
.Xr ohci 4 ,
.Xr xhci 4
.Sh HISTORY
The
.Nm
device driver first appeared in
.Fx 3.0 .
.Sh AUTHORS
The
.Nm
driver was written by
.An Lennart Augustsson Aq Mt augustss@carlstedt.se
for the
.Nx
project.
